PART I
What is a tablet and how does it work?
Tablets are like a "pen & paper" input for your computer. The stylus is the pen like device in the picture, it works pretty much like a mouse on the tray but the tip is pressure sensitive. The tray has an active area that tracks the stylus, where the stylus is on the tray is also exactly where you would be on the screen. You can get them in different sizes as well.
Like said before it works just like a mouse. A tablet controls the mouse cursor on the screen, that means you can use it with any program that uses a mouse. You can have a regular mouse and a tablet hooked up at the same time, most people keep their regular mouse and only use their tablet for art since a regular mouse is still more intuitive for navigating around the Operating System.
Why do I need a tablet?
The main reason is pressure sensitivity, which is used in all major art programs. The harder you press on the stylus will determine things like the opacity of a brush stroke, the size, or whatever else you choose in the pressure settings. These things are impossible to do with a mouse. Without pressure sensitivity its like trying to paint a picture with the back of a paintbrush rather than with the bristles.
Another reason is that its obviously easier and faster to draw with. Even the best and most expensive mouse is no replacement for drawing with a tablet.
Will my art program work with a tablet?
If its a decent program then it most likely will.
Good programs to use are:
Photoshop (any version)
Painter
Open Canvas
Alias Sketchbook Pro
You can enable different pressure settings through the brush settings of those programs. Some of them even support features like the tilt of the pen (assuming you have an Intuos tablet)
PART II
Whats the best tablet brand?
Without a question, Wacom ( is the best and really the only option. Other brands have tried to sell tablets but they quickly faded away since they cant compete with Wacom. Most people get either a Graphire or Intuos from Wacom.
What's the difference between Graphire and Intuos?
The Wacom Intuos models are the best. Its their professional series. Intuos 3 tablets have 1,024 levels of pressure sensitivity and 5,080 lpi for the resolution (accuracy). They come in a variety of sizes as well. Intuos tablets are rather expensive. The 6x8 Intuos 3 is pictured above.
Graphire tablets are their consumer line and are much cheaper than an Intuos. They feature 512levels of pressure sensitivity which is half of an Intuos, and not nearly as accurate. But even with the accuracy being much less than an Intuos 3 they are still a lot more accurate than a mouse, so theres no need to worry. Graphires are available in 2 sizes, 4x5" and 6x8"
Intuos: http://www.wacom.com/productinfo/intuos.cfm
Graphire: http://www.wacom.com/graphire/index.cfm
Can you only make good art with an Intuos?
No. Graphires are perfectly capable of doing art just as good as an Intuos. 512 levels of pressure is still quite a bit and you will barely notice the difference between it and the 1,024 levels that the Intuos provides. The biggest difference I think is that the Intuos has a much stronger signal between the pen and tablet, so theres little to no interference. The signal in the Graphire is weak so some people may experience their cursor jitter on the screen, it seems to depend on where you live since some people dont get a jittery cursor when using a Graphire. The jittering barely affects your art though, it mainly just makes selecting small areas a pain (such as grabbing window edges).
Sizes
Its a common misbelief that the small tablets are useless and the gigantic tablets are the best. Even the smallest tablet is perfectly fine, especially if you just want to color/paint. You may run into some annoyances with the size if you plan to do a lot of drawing, but even that is perfectly possible. When looking at the size of a 4x5" area it seems impossibly small to do anything in that little area, but tablets work differently than drawing on paper, digital art allows you to zoom in and out and resize your drawing area, so it is not a 1:1 ratio. Dont compare the size of a tablet to the size of your computer screen or your sketchbook.
6x8 seems to be the most common size. Some people will say 6x8 is too small to do anything good, which is crazy. Many of the top professional digital artists use 6x8's, some are even bold enough to split the tablet among 2 monitors, which makes the drawing area for each monitor even smaller than a 4x5 tablet. I use a 6x8 and wouldnt want to go any larger, even if they costed the same price.
6x11 is pretty much the same as 6x8 except that its designed for people with a widescreen monitor. They dont serve any purpose for people with regular 4:3 monitors, infact it would only hinder you because the aspect ratio is different. If you have a 16:10 widescreen monitor then you should get this size.
9x12 is another popular size among professionals. These tablets are BIG and require a good amount of space to keep. The 9x12 only accounts for the active area on the tablet, there is still a lot more plastic on the edges which makes this a desktop hog. These tablets are mainly for for people who really like to swing their arm around when drawing, or people with 2 monitors. These tablets also cost a fortune.
PART III
Are tablets exactly like drawing on paper?
No. When using a tablet you are looking at the computer screen rather than where you have the stylus. The eye hand coordination is different and does indeed take awhile to get used to. Its a lot like trying to type without looking at the keyboard, its a skill that takes practice.
When people first use tablets they usually arent impressed. Some people say that they can use a mouse better and end up giving up on using a tablet. After awhile of regular use (maybe a couple weeks), you should adjust to using a tablet and feel comfortable enough to draw lineart. After continued use, drawing on a tablet should be just as easy as drawing on paper.
The texture of the tablet is also very slick. This adds to the difficulty of learning to use it since theres barely any resistance when drawing.